TK 4955 then SQ 391 at Istanbul
Antalya → Istanbul → Singapore
Timetable, Istanbul time
16:15TK 4955 from Antalya at the gate
13:15SQ 391 to Singapore leaves the gate
21 h apart on the timetable, overnight
SQ 391 leaves 21 h after TK 4955 arrives on the timetable: more than half a day, so not a connection we count.